curl_multi_add_handle

(PHP 5, PHP 7)

curl_multi_add_handle — 向curl批处理会话中添加单独的curl句柄

说明

curl_multi_add_handle ( resource $mh , resource $ch ) : int

增加 ch 句柄到批处理会话mh

参数

mh

由 curl_multi_init() 返回的 cURL 多个句柄。

ch

由 curl_init() 返回的 cURL 句柄。

返回值

成功时返回0，失败时返回CURLM_XXX之一的错误码。

范例

Example #1 curl_multi_add_handle() example

这个范例将会创建2个cURL句柄，把它们加到批处理句柄，然后并行地运行它们。

<?php
// 创建一对cURL资源
$ch1 = curl_init();
$ch2 = curl_init();

// 设置URL和相应的选项
curl_setopt($ch1, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch1, CURLOPT_HEADER, 0);
curl_setopt($ch2, CURLOPT_URL, "http://www.php.net/");
curl_setopt($ch2, CURLOPT_HEADER, 0);

// 创建批处理cURL句柄
$mh = curl_multi_init();

// 增加2个句柄
curl_multi_add_handle($mh,$ch1);
curl_multi_add_handle($mh,$ch2);

$running=null;
// 执行批处理句柄
do {
    curl_multi_exec($mh,$running);
} while($running > 0);

// 关闭全部句柄
curl_multi_remove_handle($mh, $ch1);
curl_multi_remove_handle($mh, $ch2);
curl_multi_close($mh);
?>

参见

User Contributed Notes

3315954155 at libero dot it 20-Jul-2018 04:18
Sometime with arrays and loops (i.e. for or do while or foreach) curl_multi_init  loses some hits, to work around this problem  it is necessary to divide the loop into two parts: the start with key number zero and than, all the rest. In this way the curl_multi_init doesn't lose any hits. I did a lot of test and it seems to work well enough.
<?php

function set_option($x, $y){
curl_setopt($x, CURLOPT_URL,  $y);
curl_setopt($x, CURLOPT_HEADER, 0);
curl_setopt($x, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($x, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($x, CURLOPT_ENCODING, "gzip,deflate");
}

$nodes = array('http://php.net/manual/it/function.curl-multi-add-handle.php',
'http://php.net/manual/en/function.curl-multi-init.php',
'http://php.net/manual/en/function.curl-multi-setopt.php'
);

$node_count = count($nodes);

$curl_arr = array();
$master = curl_multi_init();
/*
now I put the first part of the array with the start key number zero, add all    
options and add the curl_multi_add_handle;                                              
it is necessary to detach this first part to avoid to lose some handles and than running
 the loop with the start key number one.                                                 
In this way the curl_multi_init doesn't lose anything and seems to be very stable.      
*/  
    $curl_arr[0] = curl_init($nodes[0]);
    set_option($curl_arr[0], $nodes[0]);
    curl_multi_add_handle($master, $curl_arr[0]);
   

/* 
now the loop can start with key number one                             
*/
$i = 1;
do {
    if ($i!==0){
 
    $curl_arr[$i] = curl_init($nodes[$i]);
    set_option($curl_arr[$i], $nodes[$i]);
    curl_multi_add_handle($master, $curl_arr[$i]);
    }
$i++;   
}while($i < $node_count);

$running = NULL;
do {
    curl_multi_exec($master,$running);
} while($running);

$results = array();
$q = 0;
do{
 $results[$q] = curl_multi_getcontent($curl_arr[$q]);
 curl_multi_remove_handle($master, $curl_arr[$q]);
$q++;   
}while($q < $node_count);

foreach($results as $value){
 echo $value;
}

?>
kamsamlt888 at gmail dot com 06-Apr-2018 09:47
$nodes = array('http://www.google.com', 'http://www.microsoft.com', 'http://yahoo.com');
$node_count = count($nodes);

$curl_arr = array();
$master = curl_multi_init();

for($i = 0; $i < $node_count; $i++)
{
    $url =$nodes[$i];
    $curl_arr[$i] = curl_init($url);
    curl_setopt($curl_arr[$i], CURLOPT_RETURNTRANSFER, true);
    curl_multi_add_handle($master, $curl_arr[$i]);
}

do {
    curl_multi_exec($master,$running);
} while($running > 0);

echo "results: ";
for($i = 0; $i < $node_count; $i++)
{
    $results = curl_multi_getcontent  ( $curl_arr[$i]  );
    echo( $i . "\n" . $results . "\n");
}
echo 'done';
Anonymous 24-Dec-2012 06:29
The 'do' loop in this example will cycle indefinitely until all curl downloads complete, needlessly using CPU cycles.  A much better way is to block while dowloads are in progress.  Refer to the example code on the curl_multi_exec() page instead, which does this!